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The Star of Adam is an oval-shaped blue star sapphire, currently the largest star sapphire in the world. [1] [2] [3] It weighs 1,404.49 carats (280.898 g; 9.9084 oz). [4]Prior to its discovery in 2015, the Black Star of Queensland, weighing 733 carats (146.6 g), was the largest star sapphire gem in the world.
Blue Anonymous owner [3] Black Star of Queensland: Australia 1938 733 carats (146.6 g) Star Black Anonymous owner [4] Star of India: Sri Lanka 563.4 carats (112.68 g) Star Blue-gray American Museum of Natural History, New York [5] Queen Marie of Romania: Sri Lanka 478.68 carats (95.736 g) Cushion Blue Anonymous owner [6] Logan Sapphire: Sri Lanka
The Millennium Sapphire is a blue sapphire discovered in 1995 in Madagascar, the natural dark–blue gem weighed 89,850 carats (nearly 40 pounds, or 17.97 kilograms). The Millennium Sapphire History
Sapphirine is a rare mineral, a silicate of magnesium and aluminium, with the chemical formula (Mg,Al) 8 (Al,Si) 6 O 20 (with iron as a major impurity). Named for its sapphire-like colour, sapphirine is primarily of interest to researchers and collectors: well-formed crystals are treasured and occasionally cut into gemstones.
Logan Sapphire; Star of Bombay, given to Mary Pickford by Douglas Fairbanks, Sr; Star of India; Stuart Sapphire; Black Star of Queensland; Star of Adam, with a weight of 1,404.49 carats (280.898 g), it is the largest star sapphire in the world. Queen Marie of Romania Sapphire
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The 423-carat (85 g) blue Logan Sapphire. Sapphire is a saturated shade of blue, referring to the gemstone of the same name. Sapphire gems most commonly occur in a range of blue shades, although they can come in many different colors. Other names for variations of the color sapphire are blue sapphire or sapphire blue, shown below.
Black Anonymous owner Blue Belle of Asia [81] Sri Lanka 392.52 carats Cushion Blue Anonymous owner Logan Sapphire [82] Sri Lanka 422.99 carats Cushion Blue National Museum of Natural History, Washington Queen Marie of Romania [83] Sri Lanka 478.68 carats Cushion Blue Anonymous owner Star of Adam [17] Sri Lanka, 2015 1404.49 carats Star Blue